Re: [hylafax-users] Encrypted FAX

[Steve Underwood <steveu@xxxxxxxxxxx>]

Lee Howard wrote:
> Steve Underwood wrote:
> > Does anyone know how widely supported the encryption options in T.30 
> > are supported?
>
> I assume that you refer to ITU T.30 Annexes G (HKM/HFX) and H (RSA) 
> which are advertised in DIS bits 81 through 91 (excluding 88)...
>
> The answer is that they're not widely supported at all.  Every time 
> I've ever surveyed for them over the past years I've not found any 
> machines "in the wild" that supported these features.  For example, I 
> just now surveyed DIS information from 12,328 different receiver 
> destinations in one database that I have.  None of them indicated any 
> ITU T.30 security/encryption support.
>
> I've heard of encryption being used in "proprietary" scenarios (i.e. 
> between dedicated fax machines for various branches of the same 
> business) and in particular in the banking industry... but I don't 
> even know if they're using Annexes G or H or if they're using their 
> own proprietary security measures.  (I tend to believe the latter... 
> done via NSF/NSS.)
>
> And this is off-topic, but in fact the only bits I ever see supported 
> beyond bit 80 are bits 97-98, and 105-111 - all of which are 
> resolution features.
Interesting. Something I saw a while ago indicated that a lot of the big 
Japanese machines support encryption. Maybe people have so little 
interest (or maybe so little understanding) that they never set up keys 
and things, and hence encryption is not advertised in the DIS messages.

Don't you see things like the double-sided capability being set? A lot 
of the high end machines are multi-functional office printers capable of 
double-sided printing.

I guess the only other high numbered bits you might expect to see would 
only be present when a T.38 capable machine is being used.

You must have a pretty rich database of DIS messages there. :-)

Regards,
Steve


____________________ HylaFAX(tm) Users Mailing List _______________________
 To subscribe/unsubscribe, click http://lists.hylafax.org/cgi-bin/lsg2.cgi
On UNIX: mail -s unsubscribe hylafax-users-request@xxxxxxxxxxx < /dev/null
 *To learn about commercial HylaFAX(tm) support, mail sales@xxxxxxxxx*